102020211123221 has 4 divisors (see below), whose sum is σ = 107389695919200. Its totient is φ = 96650726327244.

The previous prime is 102020211123151. The next prime is 102020211123239. The reversal of 102020211123221 is 122321112020201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102020211123221 - 2¹⁴ = 102020211106837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102020211123193 and 102020211123202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020211323221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2684742397961 + ... + 2684742397998.

It is an arithmetic number, because the mean of its divisors is an integer number (26847423979800).

Almost surely, 2^{102020211123221} is an apocalyptic number.

It is an amenable number.

102020211123221 is a deficient number, since it is larger than the sum of its proper divisors (5369484795979).

102020211123221 is an equidigital number, since it uses as much as digits as its factorization.

102020211123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369484795978.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 102020211123221 its reverse (122321112020201), we get a palindrome (224341323143422).

The spelling of 102020211123221 in words is "one hundred two trillion, twenty billion, two hundred eleven million, one hundred twenty-three thousand, two hundred twenty-one".